Which of the following is an example of vic-dihalide?
(a) Dichloromethane
(b) 1, 2-dichloroethane
(c) Ethylidene chloride
(d) Allyl chloride
(b) 1, 2-Dichloroethane is the example of a vic-dihalide. This is because the presence of two Cl atoms on vicinal carbon atoms (adjacent).